Isotope product rating
Websites are different and so are their designs. To make sure that the extension fits any, there are two different rating star designs provided by default: vector and image.
The vector stars are generated in the frontend using the special font. Mechanism is pretty the same like of the popular FontAwesome library or any other font-based icon sets. This gives some nice styling possibilities as your are able to set the stars size and their color without a need to create any images.
If you prefer the image stars however, there is also a solution for that! The other style included in the product is based on real PNG images. There is a default image set included in the module, however you can set your own images for full, half and empty stars in the rating configuration.